Review Chapter 10

• Science
• Secondary Education

Acetaldehyde and butanoic acid must have the same

1. Molecular formula
2. empirical formula
3. molar mass
4. chemical properties

If the molar mass of butanoic acid is 88.1 g/mol, what is its molecular formula?

1. C3H403
2. C2H4O
3. C2H60
4. C4H1302

What is the empirical formula of ethanol?

1. C4H03
2. C2H6O2
3. C2H6O
4. C4H13O2

How many atoms are in 0.625 moles of Ge (atomic mass =72.59 amu)?

1. 2.73*10^25
2. 6.99 * 10^25
3. 3.76 * 10^23
4. 9.63 * 10^23

What is the mass of one molecule of barium hexafluorosilicate BaSiF6?

1. 1.68*10^26 g
2. 2.16 * 10^21 g
3. 4.64 * 10^-22g
4. 6.02 * 10^ -23 g

Which of the following counting units would be appropriate for counting sheets of paper sold at a store?

1. dozen
2. ream
3. mole
4. pair

Which of the following quantites would have the greatest mass: one mole of carbon atoms, one mole of helium atoms, one mole of neon atoms?

1. one mole of carbon atoms
2. one mole of helium atoms
3. one mole of neon atoms
4. They would have equal masses

The atomic mass of hydrogen-1 is 1.008 and the atomic mass of helium-4 is 4.003. Find the difference in grams between 4 moles of hydrogen and one mole of helium.

1. 0.029 g
2. 1.7 x 10^22 g
3. 0 grams
4. 4.81 x10^-26 g

What is the molar mass of H2CrO4?

1. 52 g
2. 101 g
3. 63 g
4. 118 g

What is the best method for removing water from a hydrated compound?

1. freezing
2. distillation
3. heating
4. filtration